Table 4.

School Performance of the Study Participants*

Study Group
(n = 13)
Control Group
(n = 17)
Mean (SD)Mean (SD)tP
General school success2.0 (1.1)1.7 (0.7)0.8NS
Reading1.8 (1.0)1.5 (0.5)1.3NS
Spelling2.2 (1.0)1.9 (0.9)0.7NS
Mathematics1.8 (1.0)1.8 (1.0)0.0NS
Foreign language1.9 (1.1)1.9 (0.9)0.1NS
  • Abbreviations: SD, standard deviation; NS, not significant.

  • * The teachers rated each skill using a scale from 1 to 4 (1 = belongs to the best quarter of the class; 4 = belongs to the poorest quarter of the class).